Détecteur à Grande Acceptance pour la Physique Photonucléaire Expérimentale

The original purpose of the detector was to explore the quantum chromodynamics (QCD) properties of nucleons (i.e. protons and neutrons).

To explore these properties, excitation states of the nuclei require to be measured (e.g. Delta baryons, symbol Δ).

DAPHNE was built to observe charged light mesons from the decay of excited nucleon states.

DAPHNE is a cylinder symmetric detector that was built to detect mainly charged particles from excited nucleons.

For a better identification of the observed reaction, DAPHNE is provided with three concentric and independent multiwire proportional chambers.

Two different schematic views of the detector DAPHNE. Perpendicular to the beam line (left) and along the beam line (right).